Agreed, notifications can prove useful if when not overloaded. The topic of interest must be well-chosen.
The UX design is useful, I once read that the choice for the color was due to the fact that Mark Zuckerberg cannot distinguish the colors following a specific eye dysfunction.
Obviously changes in the feature would also show that the company can fit in a new context and also to the customers / users wish.
FB will face a lot of challenges and from their response to the change of paradigme will depend its future. I guess that a lot of issues are linked to the lack of experience in their management.
As an example I can mention Google as in my previous comment and the Blockchain Technology is also drawing a lot of high profiles who want to provide their efforts to develop the structure of the future without repeating the mistake during the internet implementation.
Thanks for welcoming me I really appreciate this concept. It is also a great way to learn to know new people.